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Issue 11, 2015
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Tungsten-based porous thin-films for electrocatalytic hydrogen generation

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Abstract

Developing inexpensive and efficient electrocatalysts without using precious metals for the hydrogen evolution reaction (HER) is essential for the realization of economical clean energy production. Here we demonstrate a facile approach to access interconnected three-dimensional (3-D) porous tungsten-based (WS2 and WC) thin-films without using any templates. Benefiting from the 3-D open frameworks of these highly porous thin-films, there are enormous amounts of exposed active sites and efficient mass transport in favor of the HER. Both electrodes exhibit excellent catalytic activity towards HER with onset overpotentials of ∼100 mV for WS2 and ∼120 mV for WC, and similar Tafel slopes of ∼67 mV per decade. The long-term operation of these thin-film electrodes is confirmed by their electrochemical stability test. With the low loading mass (∼80 and ∼160 μg cm−2 for WS2 and WC, respectively), these porous thin-films are among the best tungsten-based HER electrocatalysts.

Graphical abstract: Tungsten-based porous thin-films for electrocatalytic hydrogen generation

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Publication details

The article was received on 16 Dec 2014, accepted on 09 Feb 2015 and first published on 09 Feb 2015


Article type: Communication
DOI: 10.1039/C4TA06938B
Citation: J. Mater. Chem. A, 2015,3, 5798-5804
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    Tungsten-based porous thin-films for electrocatalytic hydrogen generation

    H. Fei, Y. Yang, X. Fan, G. Wang, G. Ruan and J. M. Tour, J. Mater. Chem. A, 2015, 3, 5798
    DOI: 10.1039/C4TA06938B

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